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The vibration‐rotation energies of the linear X‐Y‐Z type molecule are derived according to a method suggested by Professor Harald H. Nielsen in a recent paper. By the proper substitutions the energy expressions are reduced to the ones appropriate for the XY 2 type molecule, and a comparison...
An investigation has been made of the quenching of cadmium resonance radiation (3261A) by a number of hydrocarbons and other gases. The following values of the quenching cross sections were obtained (in cm 2 × 10 16 ): H 2 3.54 1 − C 4 H 8 35.2 C 2 H 6 D 2 1.80 2 − C 4 H 8 30.6 C 3 H 8 NH 3...
The quantum yield of fluorescence of diacetyl, excited by radiation of λ4047 and λ4358, has been measured and found to be 0.145±0.03. It is approximately independent of pressure. On the other hand, the yield with excitation of λ3650, as first observed by Henriques and Noyes, increases...
The transference numbers for aqueous solutions of potassium bromide at 25°C have been determined by the moving boundary method. Cells with cadmium bromide and lithium bromide as cation indicators and with potassium iodate as anion indicator were employed. The measurements are more difficult than...
The average repulsive potential between a hydrogen atom and a hydrogen molecule has been computed from experimental values of elastic collision cross sections for fast hydrogen atoms (with energies of 200 to 800 electron volts) scattered in room temperature molecular hydrogen. It was possible to...
The correlation effect on the molecular distance distribution in a Bose‐Einstein gas is calculated as a function of volume and temperature, particularly for the case of degeneracy (condensation) of the gas. It is shown that, under certain conditions in the condensed state, the density as seen...
The conductivity of sintered pellets of lead chromate varies with the temperature in accordance with the Boltzmann‐type law σ ∝ exp(−1.48ev/ k T ) σ ∝ exp ( − 1.48 ev ∕ k T ) in the temperature range 700°C to 350°C and with the law σ ∝ exp(−0.60ev/ k T ) σ ∝ exp ( − 0.60...
Alkaline hydroquinone solutions, oxidized in the presence of a suitable photographic material, exert a fogging action upon that material. The fogging action is due to some transitory intermediate in the oxidation process. Various possibilities are considered, and the conclusion is reached that...
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